/*
 * Copyright (C) 2012 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package interactivespaces.util.process.restart;


/**
 * A restart strategy which refuses to try a restart within Interactive Spaces.
 * 
 * @author Keith M. Hughes
 */
public class NoRestartRestartStrategy implements RestartStrategy {

	@Override
	public RestartStrategyInstance newInstance(Restartable restartable) {
		NoRestartRestartStrategyInstance instance = new NoRestartRestartStrategyInstance(restartable);
		instance.attemptRestart();
		
		return instance;
	}

	/**
	 * A {@link RestartStrategyInstance} which will never attempt a restart.
	 * 
	 * @author Keith M. Hughes
	 */
	private static class NoRestartRestartStrategyInstance implements
			RestartStrategyInstance {
		private Restartable restartable;
		
		public NoRestartRestartStrategyInstance(Restartable restartable) {
			this.restartable = restartable;
		}

		/**
		 * Attempt the restart.
		 */
		public void attemptRestart() {
			restartable.restartComplete(false);
		}
		
		@Override
		public void quit() {
			// Nothing to do.
		}

		@Override
		public boolean isRestarting() {
			// Restarts will never happen.
			return false;
		}
	}
}
